diff options
| author | Dave Airlie <airlied@redhat.com> | 2012-06-16 07:41:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-22 11:36:53 -0700 |
| commit | 8d96bccced28ba3c12ffb923aa264aa6b0d604a1 (patch) | |
| tree | 5ac9f540b95bc4366a02b46a5954c8e9cbf0efc4 /drivers | |
| parent | eda8cc4ce07d538bb4170330e53ae52c5f637be8 (diff) | |
drm/udl: only bind to the video devices on the hub.
commit e5a867a51d9b009f90d5dca6a320608e4e8a37ec upstream.
This is ported from udlfb.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=832188
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_drv.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c index 53673907a6a0..08eff0dbb80f 100644 --- a/drivers/gpu/drm/udl/udl_drv.c +++ b/drivers/gpu/drm/udl/udl_drv.c @@ -13,8 +13,21 @@ static struct drm_driver driver; +/* + * There are many DisplayLink-based graphics products, all with unique PIDs. + * So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff) + * We also require a match on SubClass (0x00) and Protocol (0x00), + * which is compatible with all known USB 2.0 era graphics chips and firmware, + * but allows DisplayLink to increment those for any future incompatible chips + */ static struct usb_device_id id_table[] = { - {.idVendor = 0x17e9, .match_flags = USB_DEVICE_ID_MATCH_VENDOR,}, + {.idVendor = 0x17e9, .bInterfaceClass = 0xff, + .bInterfaceSubClass = 0x00, + .bInterfaceProtocol = 0x00, + .match_flags = USB_DEVICE_ID_MATCH_VENDOR | + USB_DEVICE_ID_MATCH_INT_CLASS | + USB_DEVICE_ID_MATCH_INT_SUBCLASS | + USB_DEVICE_ID_MATCH_INT_PROTOCOL,}, {}, }; MODULE_DEVICE_TABLE(usb, id_table); |